sudo (/ˈsuːduː/ or /ˈsuːdoʊ/) is a program for Unix-like computer operating systems that allows users to run programs with the security privileges of another user, by default the superuser. The name is a contraction of "do as su" where "su" is an abbreviation for "super user."Unlike the related command su, users must supply their own password for authentication, rather than the password of the target user.